For occasion, some vaccines underneath the Universal Immunisation Programme (UIP) can be utilized for about 4 weeks after the vial is ope-ned (for the primary time). This can’t be completed with out VVMs, as they show key indicators, specifically the storage temperature, which helps in correctly stocking and transporting vials.
“As there will be no VVMs and expiry date on the vial of the vaccine that will be supplied, cold chain maintenance will be of prime importance… Open vial policy will not be applicable and therefore the vaccination officer should mark date and time of opening vial, all open vials need to be discarded after four hours of opening or at the end of session,” the Union well being ministry mentioned in its tips shared with states. The tips added that at each web site a supervisor ought to make sure that the temperature of vaccine carriers are being correctly maintained and recorded.
Veteran virologist T Jacob John defined that in contrast to inactivated vaccines that are allowed to comprise brokers that preserve them sterile, dwell vaccines just like the one SII (Serum Institute of India) is producing, don’t have them. This implies that whether or not or not a vaccine will get contaminated is dependent upon its chilly storage.
“Any inactivated vaccine can withstand the break of the cold chain, but live virus vaccines must be maintained at a particular temperature. If that is broken and the temperature goes above 8° Clesius, its potency may go down. Generally, once it is out of the cold chain, such vaccines can be used between 4-6 hours, beyond that if you don’t have a VVM, you aren’t sure if the temperature is being maintained, so it is best not to have an open vial policy,” John mentioned.
This, nonetheless, additionally implies that there are excessive probabilities of wastage on condition that the vials have for use/ discarded inside 4 hours and as per current tips solely 100 individuals will be given vaccine pictures per web site/per day. Incidentally, this has been taken care of on condition that in contrast to common immunisation programmes, which see individuals drop in as and when on any given day, Covid vaccination is by prior appointment which permits officers to know the way many individuals can be at a web site on any day. Unlike the SII vaccine, the one being developed by Bharath Biotech is an inactivated vaccine, and an open vial coverage could also be utilized there. The ministry’s tips say that acceptable directions can be given for various vaccine sorts.